Paul Krugman: Let's Get Fiscal -- Big Government, Good; Pig Government, Bad...!

The Dow is surging! No, it's plunging! No, it's surging! No, it's ...

Nevermind. While the manic-depressive stock market is dominating the headlines, the more important story is the grim news coming in about the real economy. It's now clear that rescuing the banks is just the beginning: the nonfinancial economy is also in desperate need of help.

And to provide that help, we're going to have to put some prejudices aside. It's politically fashionable to rant against government spending and demand fiscal responsibility. But right now, increased government spending is just what the doctor ordered, and concerns about the budget deficit should be put on hold.

Before I get there, let's talk about the economic situation.

Just this week, we learned that retail sales have fallen off a cliff, and so has industrial production. Unemployment claims are at steep-recession levels, and the Philadelphia Fed's manufacturing index is falling at the fastest pace in almost 20 years. All signs point to an economic slump that will be nasty, brutish — and long.

How nasty? The unemployment rate is already above 6 percent (and broader measures of underemployment are in double digits). It's now virtually certain that the unemployment rate will go above 7 percent, and quite possibly above 8 percent, making this the worst recession in a quarter-century.

And how long? It could be very long indeed.